From an association quiz

[chapmaja]

Originally Posted by MD Longhorn

Intentional Fly?

Cutting through the irrelevant stuff, the answer to your question is that YES, the umpire can (and very likely should, in this case) retroactively rule an INFIELD fly and place runners accordingly. Umpires should have called it at its apex (IFF if Fair), but having failed to do so they MUST fix this error, call BR out, and leave the runners on 1st and 2nd.

NO, you should not allow a double play here, as the runner only advanced because of the umpire's error in not calling it an IFF when he was supposed to.

I did not say anything about when the IFR was called. In the event it is close to the line the proper mechanic is Infield Fly if Fair. If that call is made, then the only option on the play is a double play.

Now, as for the situation if the umpire does not make the call initially.

The proper ruling, which I just found in the casebook is:

B4 is out on an infield fly, even if it is not called initially the batter is out. Also, R2 is out for being tagged while off the base.

This is from the casebook play on page 15, (2.30 Situation B)

Ultimately it is up to the offensive team to know the situation. I can understand the idea of not counting the double play, but the proper situation for the offense in this case is to stay on the base. If no infield fly is rule, R2 is out when they are tagged standing on the base (force out). If the IFR is in play, they are safe while standing on first base, and the Batter is out on the IFR. The only bad option is to stand off the base, allowing yourself to be tagged out.